target-xxx: Use fprintf_function (format checking)

fprintf_function uses format checking with GCC_FMT_ATTR.

Format errors were fixed in
* target-i386/helper.c
* target-mips/translate.c
* target-ppc/translate.c

Cc: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/target-cris/cpu.h b/target-cris/cpu.h
index e1d48ed..d908775 100644
--- a/target-cris/cpu.h
+++ b/target-cris/cpu.h
@@ -263,6 +263,6 @@
 }
 
 #define cpu_list cris_cpu_list
-void cris_cpu_list(FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...));
+void cris_cpu_list(FILE *f, fprintf_function cpu_fprintf);
 
 #endif